II

1) Военный термин: igniter initiator, image intensifier, imagery interpretation, imagery interpreter, initial issue, installation instruction, intelligence information, intransit inventory, inventory and inspection, item identification

2) Телекоммуникации: Information Indicator (CLASS)

3) Сокращение: Image Intensification

4) Макаров: incomplete ignition, inferior index, infinite interval, interchange instability, interstitial ion, ionic impurity, isotope indicator